emp it depends on the race situation and on the riders you are in the breakaway with. Anyway, usually making double-line is a good choice (and, most important, it reduces slowing wind effects); but if the escapees have different capabilities, a single-line is preferrable (a stronger rider will pull the breakaway for more TIME, not faster). If you're weak, you just move on the front for 3-4 seconds, like in a double-line situation.